Metal-shear



E.YREINDANO.

METAL SHEAR APPLICATION FILED APR. 9. 1920.

1,372,040. Patented Mar.22,1921.

amm/wtoz g #463 ifizzifezmarzo "UNITED STATES EMIL nnnnano, or BROOKLYN, new YORK, AS'ISIGNOR '10 FORBES TUBULAR rnonuc'rs PATENT OFFICE.-

CORPORATION, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

METAL-SHEAR.

Specification of Letterslatent.

Patented Mar. 22, 1921.

Application filed Apri19,'1920. Serial No. 372,424.

To all whom it may concern: Be it known that 1, Emma RENDAno, a c tizen of the United States of America, res1ding at Brooklyn, New York, have invented a and more particularly to a shear for cutting off the irregular end of a tubular body.

An object of my invention is to provlde a shear which will cut ofi a substant1ally triangular shaped piece from the end of a spirally made tubular body such as set forth in my co-pending application, berlal No. 372,423, filed April 9, 1920, and thereby have the body sheared off square on the end.

Another object is to provide a shear having means for feeding the material to the shearing rolls.

Another object is to provide guid ng means for guiding a tubular body while bemg sheared.

Other objects and advantages wlll appear as the specification proceeds.

In the drawings, which show. merely a preferred form of my invention,

Figure 1 is a side elevat1on of my machine showing in dotted lines a tubular body being sheared.

Fig. 2 is a fragmentary end elevat on thereof.

Fig. 3 is a fragmentary sectional view taken substantially in the plane of the line 3-3 of Fig. 2. v p

Upon a suitable base 5 is mounteda frame 6 having jaws 7 and 8. Within the frame are journaled shafts 9-10. The inner end of shaft 9 may be mounted to turn in a journal box having trunnions 12--1 2 whereby. I

said box may be rocked. For supporting the suitable journal box 13. This box maybe adjusted up and down within the frame, as,

by means of the adjusting screw 14s and handle 15. Suitable means such as the pulley 16 on shaft may be provided for driving both shafts. Mounted upon the shafts 9'and 10 within the frame 6, there maybe provided feed and shear mechanism. This may beconveniently formed of a feed roll 19 prefforming an extension of the latter.

- any I catching thereon.

shearing edges of the rolls, 20-21.

erably of hardened steel. Adjacent the feed roll 19 is the shear roll 20. This latter roll is preferably of substantially frusto conical shape for a purpose to be hereinafter described. The roll 20-may likewise be of hardened steel. Mounted upon the shaft 10 for cooperation. with the rolls 19 and 20, I have shown a second feed and shear mechanism. This mayconsist of a combined feed and shear roll 21 which cooperates with the shear roll 20 when shearing the metal. The rolls 19 and 21 which are normally spaced apart a distancesubstantially equal to the thickness of the tubular body to be cut serve to feed the bod during the shearing process. A roll 22 may e mounted on the shaft 10 to assist in guiding and feeding a tubular body to the shearing rolls. A spacer such as 23 may be provided for bringing the edges of the rolls 20 and 21 into proper shearing position. Means for partially supporting and uidin a tubular body may be provided. or this purpose, I have shown a shaft 24: suitably secured to the shaft 10 and in Iejfl'ect on this shaft 24.- is secured'a suitable supld ort such as the roll or pulley 25. The rolls 21, 22, and should be of substantially the same diameter in order to properly guide and support the tubular body.

Mounted upon the frame there may be a suitable guide or stop such as 26. This guide is preferably made adjustablqas by slightly rounded as shown at 28 to prevent projection on the tubular body from The operation of my machine is as 'fol- 7 lower other end of the shaft 9, I have shown a The ro1ls'19 and 21 are first spaced apart a proper distance to permit the introduction of the wall of a tubular body therebetween. The tubular body having a spiral or proj ecttheshearroll 20 but will be closely ad'acent thereto. The guide 26 will be adjuste so as tobe in substantially the same plane with ltlfie e end of the body will then abut against the ,ing' end as hereinbefore described is then laced between the rolls with the base of the stop or guide member 26, and the interior surface of the body will rest upon the guide roll 25. The feed and shear mechanism 19-20 is next screwed down so as to tightly clamp the body between the rolls 19 and 21, 22, so that upon rotation of the shafts, the bod will be fed through the shearing rolls. he shafts will then be rotated and the projecting end of the body sheared oil by the shearing rolls 20, 21 while the body is guided by means of the roll 25, guide or stop member 26, and feed rolls 19 and 21. Due to the frusto-conical shape of the roll 20, the sheared ofl:' end of the body will be permitted to curl up and fall to the rear of the shears.

While I have described the shear in some detail, and as particularly adapted for shearing bodies wlth spiral or irregular projecting ends, it is deslred that it be understood that various modifications may be made, and that the shear may be used for various other purposes.

I claim:

1. In a shear for trimming the end of a sheet metal tube, a frame, a pair of shafts mounted for rotation in said frame, a pair of shearing rolls mounted upon said shafts, and a guide mounted on. said frame and having an extended bearing surface in a plane substantially that of the shearing edges of said rolls whereby tubes of various diameters may be. sheared and the ends be guided by saidguide without readjustment of the latter.

2. In a shear. for trimming the end of a sheet metal tube, a frame, a pair of shafts mounted for rotation in said frame, a pair of shearing-rolls mounted upon said shafts, means for feeding a tube to the shearing rolls, a guide for the end of a tube being sheared and having an extended bearing surface in a plane substantially that of the cutting edges of the shearing rolls, and a support for supporting the body of a tube while being sheared.

3. In a shear for trimming the end of a spiral sheet metal tube, a frame, a pair of shafts mounted for rotation in said frame, a pair of shearing rolls mounted upon said shafts, a feed roll mounted upon one of said shafts and cooperating with one of said shearing rolls for feeding the bod of a tube to the shearing rolls, and a su stantially flat guide mounted u on said frame and in a plane substantial y that of the shearing edges of said rolls.

4. In a shear for trimming the end of a spiral sheet metal tube, a frame, a pair of shafts mounted for rotation in said frame, a pair of shearing rolls mounted upon said shafts, a pair of feed rolls mounted upon said shaft-s for feeding the body of a tube to the shearing rolls, one of said shearing rolls being of substantiall frusto-conical shape to permit the sheared off edge of the tube to curl up and fall to the rear of the rolls, and a substantially fiat guide mounted u on said frame and in a plane substaiptlally that-of the shearing edges of said ro s.

5. In a device of the character described, a frame, a shaft mounted for rotation in said frame, a frusto conical shear roll and a feed roll mounted upon said shaft, a second shaft mounted for rotation in said frame, a combined feed and shear roll mounted upon said last mentioned shaft and cooperating with the rolls on said first mentioned shaft, an extension on one of said shafts, a support mounted thereon for supporting a body bein sheared, and an adjustable stop or gui e mounted on said frame and in a plane substantially that of the shearin edges of said shear rolls, said stop or gui e having a rouned edge.

EMIL RENDANO. 

